1.3 tools and-repl

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futurespective

Technology Education

REPL - Read eval print loop
Command line shell for on-the-fly execution of
Scala statements
bin/scala
mvn scala:console (not on Windows)

IDE
They are all !#$&§? compared to what you are
used to with Java support
Netbeans (very good) but bad in other areas...
IDEA (pretty good) but slow compilation, bonus
community edition is free (with Scala)
Eclipse (not all that good) but very fast when working

Tasks (20 min)
Run REPL Make the two classes
scalaexamples/intro/HelloWorld.scala print
Windows: “Hello world”. What is the difference?
<<scala_home>>/bin/scala
Remove comments from @Test for the
Others: mvn scala:console (from methods in
scalaexamples/intro) scalaexamples/intro/CreateStuffTest.scala.
Execute a few statements Make tests pass.
Run unit test in IDE (JUnit 4)
Open the 'intro' project
scalaexamples.intro.MyFirstTest
Create a failing test
Make it run

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1.3 tools and-repl

1. REPL, IDE and setup

2. REPL - Read eval print loop Command line shell for on-the-fly execution of Scala statements bin/scala mvn scala:console (not on Windows)

3. IDE They are all !#$&§? compared to what you are used to with Java support Netbeans (very good) but bad in other areas... IDEA (pretty good) but slow compilation, bonus community edition is free (with Scala) Eclipse (not all that good) but very fast when working

4. Tasks (20 min) Run REPL Make the two classes scalaexamples/intro/HelloWorld.scala print Windows: “Hello world”. What is the difference? <<scala_home>>/bin/scala Remove comments from @Test for the Others: mvn scala:console (from methods in scalaexamples/intro) scalaexamples/intro/CreateStuffTest.scala. Execute a few statements Make tests pass. Run unit test in IDE (JUnit 4) Open the 'intro' project scalaexamples.intro.MyFirstTest Create a failing test Make it run

1.3 tools and-repl

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